Essentially, yes. The ACD simply has a threaded plug that service technicians use to adjust the spring tension on the poppet. The LX has one adjustment inside of the knob for fine tuning the reg, otherwise the LX knob and the adjustment on the ACD operate the same. The LX just gives you the luxury of being able to adjust it during the dive. If you had access to the parts you could easily make an ACD into a LX. However, I must note that it's a little more complicated than removing the plug and screwing in the knob. There is a pin that prevents you from completely backing out the plug or knob that requires disassembling the second stage in order for you to get to it.